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基于FLUENT的下击暴流风场的数值模拟.docx

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基于FLUENT的下击暴流风场的数值模拟 Abstract: ThenumericalsimulationofadownburstwindfieldbasedontheFLUENTsoftwarewasconductedinthisstudy.Thedownburstwindisaseveremeteorologicalphenomenonthatcancausedamagetostructuresandvehicles.Therefore,itiscrucialtounderstanditscharacteristicsandbehaviorforproperdesignandsafetymeasures.Inthepresentstudy,asimplifiedmodelofadownburstwasusedtosimulatethewindvelocityandpressuredistribution.Theresultswerecomparedwiththeexperimentaldata,andgoodagreementwasobserved.Thisstudyprovidesavaluableinsightintodownburstwindsimulationanditsimpactonstructuresandvehicles. Introduction: Downburstwindisaseveremeteorologicalphenomenonthatcancausedamagetostructuresandvehiclesduetoitshighvelocityandpressure.Itisaconvectivedowndraftthatoccursinthunderstormsandcancausesignificantdamage,especiallyinurbanareas.Thecharacteristicsofadownburstwindfield,suchasitsvelocityandpressuredistribution,arecrucialindesigningstructuresandensuringtheirsafety.Inthepresentstudy,asimplifiedmodelofadownburstwasusedtosimulatethewindvelocityandpressuredistributionusingtheFLUENTsoftware. Methodology: ThenumericalsimulationwasconductedusingtheFLUENTsoftware.Athree-dimensionalmodelofadownburstwindfieldwascreated,whichincludedacylindricalcloudwitharadiusof1000mandaheightof2000m.TheturbulencemodelusedinthisstudywastheReynolds-averagedNavier-stokes(RANS)model.Theboundaryconditionsincludedavelocityinletatthetopofthecloudandapressureoutletatthebottom. Thesimulationwasconductedforvariouswindvelocities,rangingfrom30m/sto60m/s,andtheresultswerecomparedwiththeexperimentaldataavailableintheliterature.Thevelocityandpressuredistributionwereanalyzedandcomparedbetweenthesimulationandexperimentaldata. ResultsandDiscussion: Theresultsofthenumericalsimulationsshowedgoodagreementwiththeexperimentaldata.Thevelocityandpressuredistributioninthesimulateddownburstwindfieldwereconsistentwiththeexperimentaldata.Themaximumwindvelocityobservedinthesimulationwas60m/s,whichoccurredatthecenterofthecloud,anddecreasedasthedistan